I have a raytheon dragonfly 5 with a down scan. All last year, I would switch back and forth between the traditional color sonar and the down scan. I never saw a single fish on the down scan even while seeing and catching schools of them with the regular sonar. This includes fishing big schools of perch in Erie over 60' I had a chance to complain to a raytheon rep at the Niagara show and he said I had to slow the chart speed down to the slowest setting and they would turn up. Even had some video loops of the difference between fast and slow chart speeds. Don't get confused, not boat speed - chart speed. Obviously, I
have not tried this yet, but I will in the next couple of weeks. I will report back.